This is how I script a tmux layout


 bash -c "tmux new-session -t 'editor' -d;\
    tmux split-window -v 'zsh';
    tmux send-keys nvim Space /src/ Space +GFiles C-m; \
    tmux rotate-window; \
    tmux select-pane -U; \
    tmux -2 attach-session -d
    "